North Korea has sentenced a US citizen to eight years' hard labour for illegally entering the country. State news agency KCNA said 30-year-old Aijalon Mahli Gomes, from Boston, admitted his wrongdoing in court. <br/><br/>Gomes had worked as an English teacher in South Korea, and reportedly crossed the border from China on 25 January. Swedish diplomats were allowed to attend the trial, as the US has no diplomatic presence in North Korea. Gomes was also fined 700,000 dollar. It is not clear why he entered North Korea.